1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce3453288b00eda361bcbe279c5bd181f51b4fe6a378219d4730c9e8333e2b3. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b373a506-aa59-4677-ae8b-8d4c73a37121.json and https://artists.proofprofile.net/proofs/artist/b373a506-aa59-4677-ae8b-8d4c73a37121.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036d867bf88b592507943d5b40ee39cf7647bf4b1534a307673b44e6b2374d03. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWDL72017006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f3d7abf86831db0f0b6b823c0c92d07ae37f15de66b9399b918d8da80004a3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWDL72017007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cc7e3c99d8c0b9e76c96e2dac065186b63fe59b7480f79fd12ce8367ff01c6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWDL72017008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a2afdaa62e427c3a825c99295522fc927784702b36b3dfba10ac559c2bb6a2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWDL72017009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307d0adc79aa3d2cecb683b5bcb0e7db744c91ef09585bfc3579fa691c9c7d23. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWDL72017010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91b04409a9ce489131788239305f0a4c1786b36db7ccecdc74a3e7f16fbe8c0. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWDL72017011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8231411a96052383f6ecc7c57cc418e8adab4f2a84f199f95a0e43dd34cdabe6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWDL72017012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfd805ac8ebc01c14527382baab4f0444ac83a2e8ecdbab335ce3c8e40d4d4e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWU712101022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1c6d5bdf5087d44a5e336b60f0fb5c358df1caed7e48815402c8bf801b788e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWU712101023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db3a8993e1cfb2c44f8638ad9d508d05e89a4c2fafaebb0c308ad7ca1dc2847. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TWDL72103237.